20474+3629 STT 413 AB (Lam Cyg)

 
 
20h 47m 24.53s +36 29' 26.7" P.A. 1.00 sep 0.9 mag 4.73,6.26 Sp B5Ve dist. 235.85 pc (769.34 l.y.)
 
 
Coord 2000 20474+3629 Discov num STT 413 Comp AB Coord arcsec 2000 20 47 24.53 +36 29 26.7
Date first 1842 Date last 2022 Obs 425
Pa first 117 Pa last 0.5 P.A. Now (θ) 0.5°
Sep first 0.7 Sep last 0.935 Sep. Now (ρ) 0.935"
Mag pri 4.73 Mag sec 6.26 delta mag (ΔM) 1.53 Spectral class B5Ve (blue-white)
Pri motion ra +015 Sec motion ra
Pri motion dec -008 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
20474+3629 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 70505 20 47 25 +36 29 27 MCA 63 Aa,Ab 2012 24 46 0.1 5.40 5.80 0.40 Y
Show Lam Cyg 70505 20 47 25 +36 29 27 STT 413 AB 2022 425 1 0.9 4.73 6.26 1.53 Y <===
Show 70505 20 47 25 +36 29 27 S 765 AC 2018 28 106 82.8 4.76 9.65 4.89
Show 70505 20 47 25 +36 29 27 FYM 126 AF 2012 3 119 52.0 4.76 14.00 9.24
Show 20 47 31 +36 29 04 FYM 126 CD 2015 6 112 9.4 9.65 14.00 4.35
Show 20 47 31 +36 29 04 FYM 126 CE 2012 3 207 40.1 9.65 13.60 3.95
Septuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Lam Cyg Constellation Cygnus SAO 70505 HIP 102589
Tycho2 2699-03425-1 Gaia DR2 1870779903225039872 HD 198183 HR 7963
GC 28994 ADS 14296 BD BD+35 4267 Bayer Lambda Cygni
Bayer name Lam Cyg Flamsteed 54 Cygni Flamsteed name 54 Cyg Distance 235.85
Distance ly 769.34 Bayer greek λ Cyg
 
 
ORBITAL ELEMENTS
 
 
Period (P)800.7968y± 382.2193 Periastron (T)1836.8376y± 43.4714 Semi-major axis (a)0.96104a± 0.22777
Eccentricity (e)0.44363± 0.19446 Inclination (i)144.665°± 13.111 Longitude of periastron (ω)300.9°± 28.471
Node (Ω)67.923°± 82.533 Notesn ReferenceIzm2019
Equinox Last observation2014 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 8.1 0.873
2001 7.7 0.875
2002 7.3 0.876
2003 6.9 0.878
2004 6.5 0.880
2005 6.1 0.881
2006 5.8 0.883
2007 5.4 0.885
2008 5.0 0.887
2009 4.6 0.888
2010 4.2 0.890
2011 3.8 0.892
2012 3.4 0.893
2013 3.1 0.895
2014 2.7 0.896
2015 2.3 0.898
2016 1.9 0.900
2017 1.6 0.901
2018 1.2 0.903
2019 0.8 0.905
2020 0.4 0.906
2021 0.1 0.908
2022 359.7 0.910
2023 359.3 0.911
2024 359.0 0.913
2025 358.6 0.915
2026 358.3 0.916
2027 357.9 0.918
2028 357.5 0.920
2029 357.2 0.921
2030 356.8 0.923


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds20474%2B3629d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic